package com.common;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginFilter implements Filter {

	public void destroy() {}
	
	public void init(FilterConfig arg0) throws ServletException {}

	public void doFilter(ServletRequest request, ServletResponse response,FilterChain fc) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse res = (HttpServletResponse) response;
		req.setCharacterEncoding("utf-8");		
		res.setCharacterEncoding("utf-8");
		if (req.getSession().getAttribute("User")==null) {
			res.sendRedirect(req.getContextPath()+"/index.jsp");
		}
		fc.doFilter(request, response);
	}
}
